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' 4@uiten 'tutes getter y y NELSON n. BUNDY, or NEW YORK, N. Y., ASSIGNOR To i-IriMs'n-Lr AND E. PHILBRICK, OF SAME PLACE.

lllletters Patent Aro. 72,793, dated December 31, 1867..

IMPROVEMENT IN" BOILER .WATER-GAGES.

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TO ALL WHOM IT MAY CONCERN:

B e it known that LNELSON BUNDY, of the city, county, and StateofNew York,'have'invented a new and useful Improvement 'onWater-Gnugcs, of which the following is a-full, clear, and exact description, reference being had to theI accompanyingdrawing, forming apart of this specification, and in whichl Figure 1 represents a side vieuj of a water-gauge constructed according to my' improvement, and

Figure 2 a sectional elevation of the same, also viewed from the side.

Similar letters of .reference indicate corresponding parts.

My improvement in water-gauges for steam-boilers consists, in combination with an automatic valvearrangement, of a three-waylcock, and no vel arrangement of passages at oppositeiends of the'gauge, for facilitating blowing oli` through the gauge-tube, preventing eseape of water or steam when required to remove the tube, or, where required, to remove the automatic valves, working the gauge independently of them.

Referring'tb the accompanying drawing, represents the end, or, itmay be, sido'plate of a boiler, and BC the upper and lower or steam and water-connections or branches of the gauge with the boiler. D is the ordinary glass gauge-tube, connecting the steam and water-branches B C. These branches have each a direct passage, a a, running through them, from the boiler to, in 'case ofthe lower branch, C, a passage, b, in communication with the lower end of the tube D, .and in case of the upper branch, B, to a chamber, c, in communication with the uppenendof the said tube, said passages c a', however, being intercepted or controlled by threeway cocks E E', which also serve toV control passages d e, the one of which passages is in communication with a cage,fy containing a. ball er. other suitable valve, F, that, dropping by its gravity, leaves open the aperture d, but, closing by the pressure of steam against, a seat, g, shuts off Vegress through a. passage, 7L, of a ..s uita`nly perforated and grooved cap or plug, G, which connects, by apassage, z', with the chamber c, while the'lower passage e, by a right-angled or other bend, connects, through a grooved and perforateddisk, k, with a dischargepassage, Z, controlled by a stop-cock, m, and further connects with a cage,'n, which is in communication with the passage b, that is controlled by'a ball or other suitable valve, F, opening by its own gravity, or it may be (as also may be the case with the other valve, by the action of a spring," and closing against a seat, c.

From this description, itiwill be seen that supposing the cocks E E- to be in the position represented forthem -in g. 2, when the handles S S', controlling them, are in the position represented by black lines in lig. 1, then the valves F F will remain open, and steam How, by the passages a, d, 7a, and z', to-the chamber c, communicating with the upper end ofthe tube D, vwhile water will How from the boiler by the passages a e, disk c, cage n, and aperture Z1, up into the lower end or portion of the tube D, the valves F F" remaining open aslong as'such an equilibrium of pressure is established. -Supposing, however, the vtube to be accidentally broken, and the cocks E E to be in the same position, then the ilow of water will close up the valve F against the seat o, and the steam shutvthe valve F against the seat g, thus preventing escape of both'stea'm and water in an automatic and eifectual manner. v l

Where it is required toblow out the tube D, then thc cock E should be turnedfto close the aperture d, to

prevent the valve F closing, or establishing the current to effect the blowing out, and, serving to open a directv steam communication 'with the-chamber c by ,the passagea, and at the same time the cock E be similarly turned,

'the handles S S being set to the position shown on red lines, to shut off communication-with the passage e, and

open the direct passage a, througl1 they aperture b, into the cage n, through the disk k, into the passage l, when, by opening the cock m, the blowing out of the tube D will be effected. In case of it being necessary to shut od' communication of the gauge with the' boiler by hand, toinsert a fresh tube, D,repair or clean the valves e F F', or for any other purpose, then the handles S S may be turned to the position shown in blu'e lines, when thecocks E E will close the portions of the passages au lying between said cocks andthe boiler. When the Cocks EE' establish direct communication, by the passages a a', with the upper and lower ends of the tube D, then. thegauge may bework-ed as an ordinary gauge, independently of the valvesF F'.

' l What I here claim, and desire to secure by Letters Patent, is' j The combination of the automaticva'lves FF., constructed and operating substantially as described, with the three-way coclrs or valves EE", controlling passages 'arranged substantially as 'decribed, for action' in concert, when required, with a blow-off cock, m, essentially as'herein set forth.

' N. H. BUN DY.

Witnesses:

A. Ln CLnnc, W. K. TrroMAs. 

